Dredge



- H. E. DOREN DREDGE Feb. -9 1926. 1,572,472

Filed March 9, 1925 INVENTOR Henry E Daren wkW Patented Feb. 9, 1926.

UNITED v.s'raras HENRY E. DOREN, EDMONIJS, 'W'ASI-IIHGTDN.

manner.

Application filed March 9, 1925..

To @771 whom it may camera:

Be it known that I; HnNRY E. Donnn, a citizen of the United States ofAmerica, and resident of the city of Edmonds, in Snohoinish County andState of lVashington, have invented certain new and useful Im provementsin Dred 'es, of which the following is a specification.

My invention relates to hedges of that type in which jets of water areempl yed tor disturbing the bottom and current flow for carrying awaythe materials disturbed by the jets.

The object oi the invention is to provide a simple and cheaply operateddredge ,for

work in channels having flow of water therethrough, either natural flow,as rivers, or tidal flow, and to remove such materials as sand and siltbars.

My invention consists, essentially, of abarge or float having mountedthereon means for discharging water from jets under pressure anddeflecting aprons by which the natural flow of the water in the channelis deflected downwardly upon the bottom so as to increase its force andits silt-carrying capacity, until the material disturbed has beenremoved down stream a sultlcient distance to get it out or the way.

In the accompanyingdrawings I have illustrated my device in a more orless diagrammatic manner.

Figure 1 is a side view of my device as a whole.

Figure 2 is a side view illustrating in a somewhat larger scale certaindetails of construction of the mechanism.

Figure 3 is a face view of one of the current-deflecting aprons.

In the drawings, 1 represents a barge or float of any suitable type.This may be provided with means for self-propulsion, or be towed byanother vessel. It is intended in the operation of my device to move thesame slowly either up or down stream. Means should be provided upon thefloat for pumping water under pressure, the same to be discharged fromthe nozzles provided in connection with the deflecting aprons. In Figure1 I have illustrated diagrammatically a boiler 10, an engine 11, and acentrifugal pump 12, together with a water storage tank 13. Any suitabletype of mechanism for securing the discharge of water under pressuremay, how ever, be employed.

'- The float is provided preferably at each .Serial No. 14,110.

end, and in some cases possibly at the sides,

angle thereof. changed as the circumstances dictate.

In the drawings I have shown l ua ues or beams 3 projecting at the sternand bow ro l? the barge, serving as a base by which the aprons may bepivoted and from which they may be controlled. These aprons are pivotedas at 20, near one end. At the other end of the apron a cross pipe orheader 4 is provided, this having a number of discharge nozzles &0.Water is conducted from the pump or from the water pressure tank througha pipe, as 41, to the header 4. The header 4 is preferably made so thatit may be rocked upon its longitudinal axis so as to direct the jetsissuing from the nozzles 40 in any direction desired, within certainangular range. The jets discharged from these nozzles are directeddownwardly and will loosen or stir up the bottom it it be of sandy orsilty material.

It is assumed that there is a flow of water ina channel at the pointwhere work is being done. The direction of flow is indicated in Figure 1by the arrow 15. The aprons 2, being inclined downwardly and in thedirection of flow of water, the current will be defiected downwardly andwill be increased in velocity as it passes under the lower edge of theaprons, the same being the point where the material has been stirred upby the nozzle 40. In consequence it will be carried down stream.

In some cases it will be found desirable to have the pivoted upper endof the apron supported by links as 5, shown in Figure 2. Said links arepivoted at 20 to the upper edge of the apron and at 50 to the frame.work of the dredge. This permits bodily raising and lowering of thisupper edge of the apron. The raising and lowering of the apron may becontrolled through lines as 6 and 60, which are attached thereto andconducted over suitable guides mounted upon the dredge. In some casesthe upper edge of the apron may be provided with beams as 62extendingfarther upwards, and lines as 61 leading from drums as 63 maybe attached ther t olilrai ing he o tb a d'ed e f the apron. The apronsmay be raised and controlled by any suitable mechanism.

In operation the dredge Will be placed over a. sand bar or shallow placein the channel and will be slowly moved up and down the channel. Thematerial will be stirred up by the jets and then removed by the currentto some point where the velocity of flow has been lessened and sedimentoccurs. By making the header core rotatable to control the direction ofdischarge of the jets, a more elfective action is obtained than may besecured by having the same stationapron, as a means for controlling theangular direction of? the jets 40. These may be operated by hand or bypower, as desired.

lVhat I claim as my invention is 2 In a dredge, a supporting hull, beamsprojecting beyond eachend ot' the hull, current deflecting planespivotally supported from said beams to permit setting them to defleetthe current downwards, a water pumping system, a header pipe extendingalong the lower edge of the apron and having supply connection with thepumping system, discharge nozzles carried by said header pipe todischarge downwardly, and means for rocking the header pipe to therebyvary the angle of discharge of the nozzles.

Signed at Seattle, King County, lVashington, this 28th day of February,1925.

HENRY E. DOREN.

